/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDRigidClustering.h
FindChildrenWithinRadius Find the children of an active cluster from a world position and a radius current implementation will pick the closest based on the distance from the center future implementation may expose option for more precise queries if bAlwaysReturnClosest is checked this will always return the closest from the location even if the radius does not encompass any center of mass
[TArray](API\Runtime\Core\Containers\TArray)< [FPBDRigidParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidParticleHandle) * > FindChildrenWithinRadius ( const [FPBDRigidClusteredParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidClusteredParticleHandle) * ClusteredParticle, const [FVec3](API\Runtime\ChaosCore\Chaos\FVec3) & WorldLocation, [FReal](API\Runtime\ChaosCore\Chaos\FReal) Radius, bool bAlwaysReturnClosest ) const